ML20079K837
| ML20079K837 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 12/21/1982 |
| From: | Carey J DUQUESNE LIGHT CO. |
| To: | Varga S Office of Nuclear Reactor Regulation |
| References | |
| TAC-49437, NUDOCS 8301100184 | |
| Download: ML20079K837 (5) | |
Text
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'AtB Telephone (412) 4564000 Nuclear Division P.O. Box 4 Shippingport, PA 150774004 December 21, 1982 Director of Nuclear Reactor Regulation United States Nuclear Regulatory Commission Attn:
Mr. Steven A. Varga, Chief Operating Reactors Branch No. 1 Division of Licensing Washington, DC 20555
Reference:
Beaver Valley Power Station, Unit No.1 Docket No. 50-334, License No. DPR-66 ISI Pumps and Valves Gentlemen:
By letter dated June 29, 1982, you transmitted the Safety Evalu-ation Report of the Beaver Valley Power Station, Unit No.1 Inservice Inspection Program for pumps and valves. Attached is the response required by the evaluation.
All modifications to the ISI program mentioned in the response are currently being implemented and will be incorporated into the 20-month update due May 31, 1983.
Very truly yours, J. J. Carey Vice President, Nuclear cc:
Mr. W. M. Troskoski, Resident Inspector l
U. S. Nuclear Regulatory Commission Beaver Valley Power Station Shippingport, PA 15077 U. S. Nuclear Regulatory Commission c/o Document Management Branch Washington, DC 20555 O
i 8301100184 821221 PDR ADOCK 05000334 i
G PDR L __
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DUQUESNE LIGHT COMPANY n
Beaver Valley Power Station i
Unit No.1 i
ATTACHMENT 1 Response to NRC Safety Evaluation of Requests for Relief from Inservice Testing Requirements for Pumps & Valves December 14, 1982 The following are the responses required by the safety e' valuation:
A.
Valves for which Requested Relief is Denied MOV-lHY201A MOV-lHY201B The following revised relief request is submitted:
Function:
H Recombiner Inlet Flow Regulator 2
Test Requirement:
Quarterly Full Stroke Exercise and Time Basis for Relief:
Relief is requested from quarterly full or part stroke testing of this valve because it is an integral part of the hydrogen recombiner. This valve cannot be physically observed, but operation is checked by virtue of the valve maintaining a specific flow. As an integral part of the hydrogen recombiner, it is no more critical than the hy-drogen recombiner itself. As the hydrogen recombiner is only required to be tested every six months, testing of this valve is proposed at six-month intervals.
Alternate Test:
Exercise check every six months when the hydrogen recom-biner is tested.
B.
Pumps & Valves Requiring Alternate Testing CH-P-2A CH-P-2B The heat trace boxes around the pumps will be modified to allow taking the required vibration readings and bearing temperatures.
RS-P-1A RS-P-1B RS-P-2A RS-P-2B An engineering evaluation of the containment sump and associated piping will be initiated to enable the inside recirculation pumps to be flow tested in the recirculation mode during refueling outages.
We plan to perform this evaluation during the 3rd refueling outage, and if satisfactory system modifications can be made, the inside recirculation spray pumps will be run in the recirculation mode every
, (continued)
Page 2 refueling outage, starting at the 4th refueling outage, when all required measurements possible will be taken. The pumps will con-tinue to be run dry monthly, and stopped at 100 RPM, as indicated by a blue light in the control room.
The outside recirculation spray pumps will also be run on recir-culation during refueling. OST 1.13.7 has been revised to require taking pump shaf t vibration readings and bearing temperatures.
However, relief is still requested from the requirement for stable bearing temperatures prior to taking the other required data.
These pumps are run in the recirculation mode and the available water supply will overheat prior to bearing temperature stabilization.
ISI-48 ISI-49 ISI-50 1SI-51 1S1-52 ISI-53 Full stroke testing of these valves is still not considered fea-sible.
Plant modifications to allow such testing would be exten-sive and costly and would not provide any additional confidence in the operability of these valves.
1RW-197 1RW-198 The relief requests have been deleted. These valves are tested as part of OST's 1.30.2, 1.30.3, and 1.30.6.
C.
Valves Requiring Periodic Position Verification The Beaver Valley Power Station utilizes a subatmospheric contain-ment design. Therefore, any leakage past the containment vacuum valves (ICV) will be into containment and would be noted by an increasing containment pressure.
HCV-lCH-105 HCV-lCH-110 Are posi'. ion verified weekly by OST's 1.7.1 and 1.7.2, in addition, their safety position is closed; however, during normal operation, if they close, minimum recirculation flow is still available through a redundant valve and orifice combination.
1CH-36 1PC-37 1CC-247 1CC-251 ISI-41 1CV-35 1PC-10 1CC-248 1CC-252 HCV-lCV-151-1 Are checked monthly by OST 1.47.2 and are part of the locked valve log.
HCV-lCV-151 PC-9 PC-38 Are visually inspected during containment close-out and verified via the locked valve log monthly during operation by OST 1.47.2.
D.
Valves to be Tested at Cold Shutdown and Refueling The valves numbered 1FW-287 through 1FW-392 have been renumbered 1FW-622 through 1FW-627.
(continued)
Page 3 E.
Pumps and Valves for which Relief is Granted to Allow Alternate Testing as Requested Relief was granted for TV-1CC-105A and TV-1CC-105B but not for TV-1CC-105C.
It is assumed that this omission is a typographical error and relief is actually granted for TV-1CC-105C.
The valve list contains 1HY-20; however, since relief was not re-quested for 1HY-20, it is assumed that relief is actually granted for 1HY-120.
F.
Valves Requiring Pressure Isola tion Verification OST 1.11.16 was draf ted in response to an order for modification of license concerning WASH-1400 Event-V Valve Configuration. The OST leak tests valves SI-10,11, and 12 and SI-23, 24, and 25 the only Event-V Valves found in BVPS #1.
Most of the valves mentioned in this acetion are at places where the quality classification of the piping changes; however, the pressure rating of the pipe does not.
If the intent of this section has been misunderstood, please let us know what was in-tended.
1RH-720A 1RH-720B 1RH-700 1RH-701 Annunciator Al-125 (RHR Pump Discha rge Pressure High) is a suit-able monitor of RHR Pressure during operation. Relief Valve RV-RH-721 also will lif t and protect the low-pressure piping.
MOV-SI-850B MOV-SI-850D MOV-SI-850F According to sta tion drawings, RM-41A and RM-41B, the piping classi-fication up and downstream of these valves is the same. The piping classification does not change until valve SI-65 (a normally closed manual valve). Between the 850 valves and SI-65 are MOV-SI-842 and TV-SI-889, both of which are leak tested, each refueling by OST 1.47.78.
SI-10 SI-11 SI-12 i
According to station drawings RM-41A and RM-41B, the piping classi-l fication up and downstream of these valves is the sane.
It does not change until MOV-SI-890C. The low-pressure side of MOV-SI-890C is protected by RV-SI-845A, B, and C.
MOV-SI-890C is leak tested t
l by OST 1.47.53.
SI-10, 11, and 12 a re tested by 1.11.16.
SI-15 SI-16 SI-17 According to station drawings RM-41A and RM-41B, the piping classi-fication up and downstream of the valves is the same.
It does not change until MOV-SI-890A and MOV-SI-890B.
These are normally shut valves that are Icak tested at each refueling.
In addition, RV-SI-845A, B, and C provide over-pressure protection for leakage by SI-15, 16, and 17.
..- (continued)
Page 4 SI-20 SI-21 SI-22 According to station drawing RM-41A and RM-41B, the piping pres-sure classification up and downstream of these valves is the same.
These valves receive flow from three directions.
- 1) From SI-15, 16, and 17, which have over-pressure protection.
- 2) From the boron injection system; leakage in this direction will go through several valves, a tank (SI-TK-2), and/or a relief valve (RV-SI-857) before getting to low-pressure piping. This path and the re-lief valve provide suf ficient over-pressure protection for leakage by SI-20, 21, and 22 into the boron injection system.
3)
From the charging system. As this system is all high-pressure piping no over-pressure protection is needed.
SI-23 SI-24 SI-25 SI-100 SI-101 SI-102 According to station drawings RM-41A and RM-41B, the piping pressure classification up and downstream of these valves is the same.
SI-23, 24, and 25 receive flow from two directions:
- 1) From SI-10,11 and 12, and 2) From SI-100, 101, and 102.
SI-100,101, and 102 provide a parallel flow path to SI-20, 21, and 22.
SI-23, 24, and 25 a re also tested by 1.11.16 SI-48 SI-49 SI-50 Any leakage past these valves would be seen as an increase in level and pressure in the safety injection accumulators.
Existing alarms in the accumulators are sufficient to monitor leakage past these v a lves.
SI-51 SI-52 SI-53 According to station drawing RM-41B, the piping classification up and downstream of these valves is the same. These valves receive flow from two directions:
SI-48, 49, and 50 and MOV-SI-850B, D, and F, which have the same piping classification up and downstream.
The piping classification does not change until valve SI-65 (a normally closed manual valve).
Between the 850 valves and SI-65 a re MOV-SI-842 and TV-SI-889, both of which are leak tested each refueling by OST 1.47.78.
SI-83 SI-84 These valves are in the second and third flow path of SI-20, 21, and 22, which have over-pressure protection.
CH-170 MOV-RC-556A MOV-RC-556B MOV-RC-556C According to station drawings RM-37A and RM-39A, all piping connected to these valves is high-pressure piping and no over-pressure protec-tion is needed.